stddef.in.h

/* A substitute for POSIX 2008 <stddef.h>, for platforms that have issues. Copyright (C) 2009, 2010 Free Software Foundation, Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *//* Written by Eric Blake. *//* * POSIX 2008 <stddef.h> for platforms that have issues. * <http://www.opengroup.org/susv3xbd/stddef.h.html> */#if __GNUC__ >= 3@PRAGMA_SYSTEM_HEADER@
#endif#if defined __need_wchar_t || defined __need_size_t \ || defined __need_ptrdiff_t || defined __need_NULL \ || defined __need_wint_t/* Special invocation convention inside gcc header files. In particular, gcc provides a version of <stddef.h> that blindly redefines NULL even when __need_wint_t was defined, even though wint_t is not normally provided by <stddef.h>. Hence, we must remember if special invocation has ever been used to obtain wint_t, in which case we need to clean up NULL yet again. */# if !(defined _GL_STDDEF_H && defined _GL_STDDEF_WINT_T)# ifdef __need_wint_t# undef _GL_STDDEF_H# define _GL_STDDEF_WINT_T# endif# @INCLUDE_NEXT@ @NEXT_STDDEF_H@# endif#else/* Normal invocation convention. */# ifndef _GL_STDDEF_H/* The include_next requires a split double-inclusion guard. */# @INCLUDE_NEXT@ @NEXT_STDDEF_H@# ifndef _GL_STDDEF_H# define _GL_STDDEF_H/* On NetBSD 5.0, the definition of NULL lacks proper parentheses. */#if @REPLACE_NULL@# undef NULL# ifdef __cplusplus/* ISO C++ says that the macro NULL must expand to an integer constant expression, hence '((void *) 0)' is not allowed in C++. */# if __GNUG__ >= 3/* GNU C++ has a __null macro that behaves like an integer ('int' or 'long') but has the same size as a pointer. Use that, to avoid warnings. */# define NULL __null# else# define NULL 0L# endif# else# define NULL ((void *) 0)# endif#endif/* Some platforms lack wchar_t. */#if !@HAVE_WCHAR_T@# define wchar_t int#endif# endif /* _GL_STDDEF_H */# endif /* _GL_STDDEF_H */#endif /* __need_XXX */